Appliance for clamps or cramps and the like



Feb, 5 1924-. u I 1,482,989

. F. HERING APPLIANCE FOR CLAMPS 6R CRAMPS AND-THE LIKE Filed April 13, 1923 FiaL no.2

5 I ml: 6

HTTOENEY Patented Feb. 5, 1924.

STATES LESLIE FREDERICK HERING, OF LAUNCESTON, TASMANIA.

APPLIANCE FOR CLAMPS OR CRAMPS AND THE LIKE.

Application filed April 18, 1923. SerialNO. 633,007.

To all whom it may concern:

Be it known that I, Lnsnm F REDnRIcis; HERTNG, of 109 Cameron Street, Launceston, Tasmania, having invented certain new and useful Improvements in Appliances for Clamps or Cramps and the like, do hereby declare that the following is a full, clear, and exact description of the same.

The invention relates to improvements in connection with clamps and cramps hereinafter referred to as clamps.

An object of the invention is to provide an improved quick-gripping and reversible device which will effectually force together one or more boards of timber or pieces of material and temporarily retain the edges of same in close contact preparatory to and during process of nailing or securing same into permanent position. The invention is particularly applicable as a clamp for assisting in the operation of securing flooring boards in buildings. It includes similar devices being commonly designated by various terms such as floor dogs, floor cramps, clamp dogs, and the like. The clamp is constructed so as to be reversible along a beam or oist.

The invention is specially devised to provide at very moderate cost a tool which promotes rapidity and simplicity in such adjustments and temporarily holding pieces of wood or material closely together, preparatorv to securing the same permanently.

In the accompanying drawing is exemplitied a device and parts thereof, constructed according to the applicants invention.

Figure 1 is an end view of one device constituting the invention.

Figure 2 is a side view of same.

Figure is a diagrammatic representation of the device in operation.

Figure 4 shows one of the eccentric cam grips used in the construction.

The invention may comprise a lever 1 with handle 2, a cross part extending to right and left, one end 3; of said cross part extending downwardly, the other portion 4 extending laterally and provided with a serrated downward edge and a movable downward jaw 5, having serrations formed within the lower edge of its aperture 6, a slidable stop wedge 7, adapted to be moved be- .tween the top of aperture and the top of 4 by which the serrations when engaged are held interlocked. The jaws 3 and 5 are each mounted with rotatable cams 8, having their outer edges milled or serrated. A stay brace 9 is pivoted'at 10 to the lever and adapted to maintain the forward thrust of the lever. A pivot pin is passed through a hole drilled in the parts and secured by the nut 10.

In operation the lever is placed in a position approxin'iately at an angle of and then rocked forward. The movable jaw 5 is conveniently adjusted to the width of the joist such as 11 and secured thus by means of the slidable stop wedge 7 The device is then slid forward towards the boards: 12 which it is desired to clamp. This action causes the eccentric cams to rotate and firmly grip the joist member 11. The handle is then rocked forwards and downwards as shown in full lines in Figure 3 causing the boards 12 to be forced one against the other and to be retained in position by the stay 9, during the nailing operation.

I claim:

1. A clamp of the character described, comprising a lever having two downwardly extending jaws provided with rotatable cams, and means for adjusting the jaws relatively one to the other.

2. A clamp of the character described comprising a lever provided'with two downwardly extending jaws, one of the jaws being fixed and the other adjustable towards and from the fixed jaw, the jaws being provided at their ends with rotatable cams.

3. A clamp of the character described, comprising a lever provided with a downwardly extending fixed jaw and with a laterally projecting member, a jaw adjustably mounted on the said member and extending downwardly parallel with the fixed jaw, and cams rotatably mounted on the ends of the said jaws.

4:. A clamp of the character described, comprising a lever provided with a downwardly extending fixed jaw and with a laterally projecting member, a jaw adjustably mounted on said member and extending downwardly parallel with the fixed jaw, cams rotatably mounted on the ends of the jaws, and a stay pivoted to the lever to hold the lever in position.

A clamp of the character described, comprising a lever provided with a member extending from opposite sides of the lever, the end of one portion of the member extending downwardly and forming a jaw, the other portion of the member having a serratedlower edge, a. j aw having an opening' through which the serrated portion of the said member extends, the lower wall of said opening being serrated, means for holding the serrations ofthe opening and the said portion of the member in engagement, and a stay pivoted to thevlever and adapted to hold the lever in position.

6.1m a clamp of the character described, a fixed jaw, a member extending-at right angles to the fixedjaw, a movablejaw having an opening through which the said member extends, and a slidable stop wedge in the opening of themovable jaw and engaging the upper face of said member.

Dated this nineteenth day of February, 1923.

In testimony whereof, I have hereunto signed my name in the presence of two sul =scribin witnesses:

IiE-sLiE FREDERICK HERING. \Vitnesses RICHARD COLIN STANTON,

ANDREW MITCHELL. 

